Update Tasks.md
Added scripts for Gnuplot and ImageJ (Fiji):

The Gnuplot scripts are used to process the results of
'SR-EELS_characterisation.ijm'. They create polynomials that are used to
describe the distortion.
'correctSR-EELS.ijm' and 'correctSR-EELS.py' perform the same task. They
use the polynomials and correct an SR-EELS dataset. The Python version
is much faster and it is able to correct the intensity.
correctSR-EELS will be replaced by a plugin written in Java.
Removed the version tag from the ij dependency:

If no version is given, the parent (pom-scijava) will manage this property.
Updated correction script and macro:

I did some small changes to create results that I can compare with the
Java implementation of the correction.
Merge pull request #9 from EFTEMj/additions_to_sreels

Implemented the SR-EELS correction (no correction of intensity yet):
Implemented the intensity correction for SR-EELS:

It is a Java implementation of the Jython code I wrote before.
The code will be optimized, as soon as I performed some tests with the
current implementation.